docs: some minor fixes/improvements

docs/helpers.rst

@@ -32,10 +32,10 @@ Markers
   of the test. This behavior is the same as Django's standard
   :class:`~django.test.TestCase` class.
 
-  In order for a test to have access to the database it must either
-  be marked using the ``django_db`` mark or request one of the ``db``,
-  ``transactional_db`` or ``django_db_reset_sequences`` fixtures.  Otherwise the
-  test will fail when trying to access the database.
+  In order for a test to have access to the database it must either be marked
+  using the :func:`~pytest.mark.django_db` mark or request one of the :fixture:`db`,
+  :fixture:`transactional_db` or :fixture:`django_db_reset_sequences` fixtures.
+  Otherwise the test will fail when trying to access the database.
 
   :type transaction: bool
   :param transaction:
@@ -60,8 +60,9 @@ Markers
   or may not help even if the function requesting your fixture has this marker
   applied, depending on pytest's fixture execution order. To access the
   database in a fixture, it is recommended that the fixture explicitly request
-  one of the ``db``, ``transactional_db`` or ``django_db_reset_sequences``
-  fixtures. See below for a description of them.
+  one of the :fixture:`db`, :fixture:`transactional_db` or
+  :fixture:`django_db_reset_sequences` fixtures. See below for a description of
+  them.
 
 .. note:: Automatic usage with ``django.test.TestCase``.
 
@@ -115,6 +116,7 @@ pytest-django provides some pytest fixtures to provide dependencies for tests.
 More information on fixtures is available in the :ref:`pytest documentation
 <pytest:fixtures>`.
 
+.. fixture:: rf
 
 ``rf`` - ``RequestFactory``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -133,6 +135,8 @@ Example
         response = my_view(request)
         assert response.status_code == 200
 
+.. fixture:: client
+
 ``client`` - ``django.test.Client``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -164,6 +168,7 @@ To use `client` as an authenticated standard user, call its
         response = client.get('/private')
         assert response.content == 'Protected Area'
 
+.. fixture:: admin_client
 
 ``admin_client`` - ``django.test.Client`` logged in as admin
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -179,8 +184,8 @@ Example
         response = admin_client.get('/admin/')
         assert response.status_code == 200
 
-Using the `admin_client` fixture will cause the test to automatically be marked for database use (no need to specify the
-``django_db`` mark).
+Using the `admin_client` fixture will cause the test to automatically be marked
+for database use (no need to specify the :func:`~pytest.mark.django_db` mark).
 
 .. fixture:: admin_user
 
@@ -190,9 +195,10 @@ Using the `admin_client` fixture will cause the test to automatically be marked
 An instance of a superuser, with username "admin" and password "password" (in
 case there is no "admin" user yet).
 
-Using the `admin_user` fixture will cause the test to automatically be marked for database use (no need to specify the
-``django_db`` mark).
+Using the `admin_user` fixture will cause the test to automatically be marked
+for database use (no need to specify the :func:`~pytest.mark.django_db` mark).
 
+.. fixture:: django_user_model
 
 ``django_user_model``
 ~~~~~~~~~~~~~~~~~~~~~
@@ -210,6 +216,7 @@ Example
     def test_new_user(django_user_model):
         django_user_model.objects.create(username="someone", password="something")
 
+.. fixture:: django_username_field
 
 ``django_username_field``
 ~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -219,37 +226,43 @@ resolves to the user model's :attr:`~django.contrib.auth.models.CustomUser.USERN
 Use this fixture to make pluggable apps testable regardless what the username field
 is configured to be in the containing Django project.
 
+.. fixture:: db
+
 ``db``
 ~~~~~~~
 
-.. fixture:: db
-
 This fixture will ensure the Django database is set up.  Only
 required for fixtures that want to use the database themselves.  A
-test function should normally use the ``pytest.mark.django_db``
+test function should normally use the :func:`pytest.mark.django_db`
 mark to signal it needs the database. This fixture does
 not return a database connection object. When you need a Django 
 database connection or cursor, import it from Django using
 ``from django.db import connection``.
 
+.. fixture:: transactional_db
+
 ``transactional_db``
 ~~~~~~~~~~~~~~~~~~~~
 
 This fixture can be used to request access to the database including
 transaction support.  This is only required for fixtures which need
 database access themselves.  A test function should normally use the
-``pytest.mark.django_db``  mark with ``transaction=True``.
+func:`pytest.mark.django_db`  mark with ``transaction=True`` to signal
+it needs the database.
+
+.. fixture:: django_db_reset_sequences
 
 ``django_db_reset_sequences``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. fixture:: django_db_reset_sequences
-
 This fixture provides the same transactional database access as
-``transactional_db``, with additional support for reset of auto increment
-sequences (if your database supports it). This is only required for
-fixtures which need database access themselves. A test function should
-normally use the ``pytest.mark.django_db`` mark with ``transaction=True`` and ``reset_sequences=True``.
+:fixture:`transactional_db`, with additional support for reset of auto
+increment sequences (if your database supports it). This is only required for
+fixtures which need database access themselves. A test function should normally
+use the :func:`pytest.mark.django_db` mark with ``transaction=True`` and
+``reset_sequences=True``.
+
+.. fixture:: live_server
 
 ``live_server``
 ~~~~~~~~~~~~~~~
@@ -272,6 +285,8 @@ also directly concatenate a string to form a URL: ``live_server +
   In addition, using ``live_server`` will also trigger transactional
   database access, if not specified.
 
+.. fixture:: settings
+
 ``settings``
 ~~~~~~~~~~~~
 
@@ -341,6 +356,7 @@ Example usage::
             Item.objects.create('foo')
             Item.objects.create('bar')
 
+.. fixture:: mailoutbox
 
 ``mailoutbox``
 ~~~~~~~~~~~~~~